Manage of Mo Laishi brick changes index and characteristic

     Mo Laishi is Al2O3 -SiO2 n duality the binary compound that fastens middling to press next only stability to exist, chemical type is 3Al2O3-2SiO2, natural Molaishi is very little, wait for artificial synthesis with agglomeration law or electric frit law normally. The Al2O3 71 in academic composition. 8% , siO2 28. 2% , it is the stabilizes exclusively compound in department of AI2O3-SiO2 n duality, also be the brilliant photograph with the most extensive research. Its melting point is (1890±90) , with inclined Fang Jing Cheng Jing, crystal structure is with aluminous oxygen octahedron common [AlO6] parallel develops at C axis direction, transverse criterion with [(Si, al) O4] tetrahedral with [AlO6] octahedron is common arris and the chain certificate silicate that join rises mine photograph. Along with the addition of Al3+ content, more oxygen room will arise in crystal lattice, consequently Molaishi is the network structure that a kind of unsaturated, alumina distributings in order; The gap in its structure is big, more loose.

 

       Type of Mo Laishi chemistry: A1xSi2-xO5.5-0.5x density: 3.16g/cm3 Mohs hardness: 6~7 is fireproof degree: When 1800°C still very stable, 1810 °C is decomposed be corundum and fluid photograph Mo Laishi is a kind of high grade fireproof material, it is had expand stability of even, thermal shock creep of tall, high temperature is worth softening point of wonderful, loading small, hardness is big, fight chemistry caustic good wait for a characteristic, basically have at present high pure electric frit is Mo Laishi of Molaishi, average report frit, round-the-clock like that Molaishi mixes agglomeration of aluminous aluminous concentrate to burn Molaishi gently.

 

       Mo Laishi is a kind of high grade fireproof raw material, it is had expand stability of even, thermal shock creep of tall, high temperature is worth softening point of wonderful, loading small, hardness is big, fight chemistry caustic good wait for a characteristic, basically have at present high pure electric frit is Mo Laishi of Molaishi, average report frit, round-the-clock like that Molaishi mixes agglomeration of aluminous aluminous concentrate to burn Molaishi gently. Mo Laishi AI203-SI02 yuan the binary compound that fastens middling press next only stability, chemical type is 3AI203-2SI02 natural Molashi is very little, normally the artificial synthesis such as agglomeration law or capacitance law. ;6-7 of hardness of Mo Shi of;3.16g/cm3 of density of chemical type A1xSi2-xO5.5-0.5x is fireproof degree: 1800C is to stabilize 1810C to decompose for corundum and fluid photograph.

 

       Be Molaishi this kind of unusual catenary written complaint forms a structure, make its C axis outspread blossom columnar, acicular. In fireproof material, these are acicular mutual thrust deep into the enemy forces forms Molaishi solid framework, make its have a series of good performance, if heat up voice intensity and loading bate temperature high, good heatproof shake sex, still have variable of high temperature squirm additionally small, linear expansion coefficient is small, fight chemical aggressivity to wait for an advantage by force.

 

     Linear expansion coefficient of Mo Laishi is inferior it is its model advantage. The Molaishi that industry produces is in commonly the 800 linear expansion rate when are about 0.4% . But the heterogeneity that Molaishi has axial to expand, measure so that axial expands through high temperature XRD numerical value makes clear: The bulk of the solid solution that contains Cr2O3 and Fe2O3 and electric frit Mo Laishi expands all compare metric agglomeration Molaishi is low.

 

       In the research that in AI2O3-SiO2 the department balances, about Molaishi whether be consistent melt compound vexed all the time. The experiment makes clear: Use high pure raw material is when balance of photograph of sealed condition dirty, mo Laishi is consistent melt compound; In air and when foreign matter exists, for abhorrent melt compound. Accordingly, when the real problem that analyses general silicate data, regard Molaishi as abhorrent melt compound relatively appropriate.

 Fireproof material is industrial Mo Laishi raw material fastens artificial synthesis commonly, valuable natural Molaishi mine is very few. Come nearly a few years, the development that synthesizes Mo Laishi raw material and application have very great progress. Synthesize Molaishi to use agglomeration law or production of electric frit law commonly.

 

Mo Laishi firebrick has a characteristic:

 

1. low heat conduction is led, have effect of very good adiabatic heat preservation;

 

Frit of 2. low heat, because low heat conduction is led, mo Laishi series pledges gently the heat energy with adiabatic brick very few save up, energy-saving in intermittent operation effect is apparent; 3. Matter content is low have the oxide content such as alkali metal of low-down iron box, accordingly, fireproof degree tall; The higher volume that contain aluminium makes its still maintain good performance below reducing atmosphere;

 

Intensity of compression of 4. hot condition is high;

 

5. exterior size is exact, accelerate build by laying bricks or stones to build career, reduce fireproof mud to use an amount, assured the intensity of body of build by laying bricks or stones and stability, prolong the life of liner thereby; 6. Can process special form. Seam in order to reduce number of brick of build by laying bricks or stones and build by laying bricks or stones.

 

Have agglomeration Mo Laishi brick and electric frit Mo Laishi brick two kinds:

 

1.Agglomeration not comes stone brick is main raw material with tall aluminous aluminous grog, join a few clay or unripe alumina to make bond, via shaping, firing and make.

2.Electric frit not comes stone brick is raw material with alumina of tall alumina, industry and fireproof clay, join charcoal or coke granule to make reducer, law of reductive report frit is used to make after shaping. The crystallization of electric frit Mo Laishi is bigger than agglomeration Mo Laishi, heatproof shake sex is better than agglomeration goods. Their high temperature capability basically depends on the uniformity that the content of alumina and glass of Mo Laishi get along with distributing.

Manage of Mo Laishi brick changes index be as follows:

 

Brand		Function index
		JM-23	JM-23	JM-26	JM-28	JM-30
Classify temperature, ℃		1260	1350	1430	1540	1650
Bulk density, g/cm³		0.6	0.8	0.8	1	1
Intensity of normal temperature compression, MPa		1.3	2	3	3.5	3.5
Weigh the change that burn a line, %		1250×12h	1320×12h	1400×12h	1510×12h	1600×12h
		- 0.5	- 0.5	- 0.5	- 0.9	- 0.9